From the north I saw a light over the tip neighbors house about a mile out. As it got closer could make out a horizontal bar of light, not the usual round aircraft light. Even closer could make out a wing (v)shape, thought it was a sea gull reflecting off street lights. Even closer it had the shape of a hand glider going 30 mph at 300'(2.5 trees high). crossed the back yard about 5 houses down, distance 4 or 5 stone throws away. Made an instant 60 degree turn headed s/w towards Buffalo & Lake Erie. Was flying parallel to New greenhouse along buried steam lines to New steam plant just south of my house when it turned. I feel it was mapping this newly constructed source of energey.